Rename unique key to random key as it is not really unique, add function for generating an access token from the key

 - Legacy-Id: 6716

Author: OleLaursen

ietf/utils/accesstoken.py

@@ -0,0 +1,15 @@
+import time, random, hashlib
+
+from django.conf import settings
+
+def generate_random_key(max_length=32):
+    """Generate a random access token."""
+    return hashlib.sha256(settings.SECRET_KEY + ("%.16f" % time.time()) + ("%.16f" % random.random())).hexdigest()[:max_length]
+
+def generate_access_token(key, max_length=32):
+    """Make an access token out of key."""
+    assert key, "key must not be empty"
+    # we hash it with the private key to make sure only we can
+    # generate and use the final token - so storing the key in the
+    # database is safe
+    return hashlib.sha256(settings.SECRET_KEY + key).hexdigest()[:max_length]